PVC Check Valve 25 - 75mm One Way Non-return Valve Water Adhesive Pipe Fittings

The spring type uses a coil spring to hold the disc closed and is well suited to low-flow or low-pressure lines such as drip irrigation and small domestic supply pipes. The piston type uses a weighted or guided piston for a more positive seal and is better for higher-flow circuits — for example, pool return lines or larger irrigation mains — where back-pressure is greater and a firmer closure is needed.

These valves use solvent-weld (adhesive) socket ends and are designed to fit standard PVC pressure pipe in 25 mm (~1 in), 32 mm (~1¼ in), and 40 mm (~1½ in) outside diameters. They are compatible with Schedule 40 and Class D PVC pipe. They are not designed for CPVC, ABS, or threaded connections without a suitable adapter.

PVC is widely used in potable cold-water supply systems. However, suitability for drinking water depends on local plumbing codes and any applicable certifications required in your jurisdiction. If your project requires a certified fitting (e.g., NSF/ANSI 61), please contact us to confirm before ordering.

Yes. PVC has good resistance to chlorine and the concentrations of pool chemicals typically found in residential swimming pools and spas. This makes these non-return valves a practical choice for pool circulation and return lines. Avoid exposure to solvents or chemicals outside the normal range of pool treatment products.

Cut the pipe square and deburr the end. Dry-fit the valve to confirm alignment and mark the orientation — check valves are directional, so ensure the flow arrow on the body points in the direction of intended flow. Apply PVC primer to both the pipe end and the socket, then apply PVC cement to both surfaces. Push the pipe firmly into the socket with a slight twist and hold for 30 seconds. Allow the joint to cure fully before pressurising the line (typically 15–30 minutes for initial handling strength, 24 hours for full pressure).

Standard PVC is rated for cold-water service and is typically suitable up to around 60 °C (140 °F), though working pressure ratings decrease as temperature rises. These valves are not intended for hot-water supply lines. For hot-water applications, a CPVC or other high-temperature fitting would be required.

Yes — each listing offers quantity options of 1, 2, 3, 4, or 5 pieces per order, with the per-unit price decreasing as quantity increases. Select your preferred quantity from the QTY(Pcs) option before adding to cart. For larger project quantities beyond 5 pieces, please contact us directly to discuss bulk pricing.